Thank you for your reply. When I say it crashes i mean when I hit enter to render it freezes, and say for instance I use a MB plug-in like Colorista it freezes. I hear a lot of people say they can edit natively .mov in Pr but I have had this computer for 2 years and always seem to be sluggish or had to turn playback to 1/2. I like living on the edge so I don’t have any antivirus other than Microsoft’s antivirus Security Essentials thur windows update and I dont have any thing running other than Pr. Looks like a long weekend at the drawing board 🙁